Hi there!
From what I know, the brightness of a color, in relationship to black, is a) value. Purity means that it has no black, white, or grey in it. Saturation is on a scale of 1-100, determining how transparent the color is. And hue is in relationship to the three prime colors.
Hope this helps!! :)
I believe the answer would be C if not then hopefully someone else can help.
